/*
 * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.otter.node.etl.select.selector;

import java.util.List;

/**
 * otter同步数据获取
 * 
 * @author jianghang 2012-7-31 下午02:30:33
 */
public interface OtterSelector<T> {

    /**
     * 启动
     */
    public void start();

    /**
     * 是否启动
     */
    public boolean isStart();

    /**
     * 关闭
     */
    public void stop();

    /**
     * 获取一批待处理的数据
     */
    public Message<T> selector() throws InterruptedException;

    /**
     * 返回未被ack的数据
     */
    public List<Long> unAckBatchs();

    /**
     * 反馈一批数据处理失败，需要下次重新被处理
     */
    public void rollback(Long batchId);

    /**
     * 反馈所有的batch数据需要被重新处理
     */
    public void rollback();

    /**
     * 反馈一批数据处理完成
     */
    public void ack(Long batchId);

    /**
     * 返回最后一次entry数据的时间戳
     */
    public Long lastEntryTime();
}
